Since v_0.820 every weight includes ligatures. The goal is to improve the readability of the coding texts.
Programming languages like Haskell, Scala, Swift and many others are based on ligatures.
The complete list of ligatures available are visible clicking here and here

I just added the fraktur monospaced version of PragmataPro for math use.
I tried to compose the Bible of Gutenberg just for fun.
This new feature will be available from the next release of PragmataPro (0.815). Keep in touch!